PROSOCO celebrates 80 years: The strangest stain PROSOCO ever tackled

By the 1970s, PROSOCO's reputation had grown to a point where architects and contractors were bringing them their "impossible" projects.

The company's custom and manufactured solutions erased wine stains from concrete in California wineries, and rust stains from marble in New York.

But King Kong's blood was the strangest case the company ever tackled, Jerry Boyer said.

Paramount Pictures shot the end of the 1976 remake of "King Kong" at the World Trade Center in New York City. In the end, King Kong topples off the World Trade Center, hitting the terraces between the two towers.

The problem? The contractor couldn't get King Kong's bloodstains off the terra cotta.

Solution: Call PROSOCO!

Jerry discovered the "blood" was a simple mixture of sticky Karo syrup and red food coloring.

His custom solution - which he kept secret - was equally simple.

"I used a mixture of detergent and bleach," he said. "It took eight cases."